On the visual binary Upsilon Carinae

Details On the visual binary Upsilon Carinae On the visual binary Upsilon Carinae

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.223...79m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 223, Nov. 1, 1986, p. 79-85.

Astronomy and Astrophysics

Astronomy

B Stars, Binary Stars, Radial Velocity, Stellar Spectra, Stellar Atmospheres, Stellar Evolution, Stellar Orbits, Supergiant Stars

Scientific paper

A spectral- and radial-velocity study of the components of the close visual binary system υ Carinae is presented. The data show that the fainter star of this system is an early B star of spectral type B3 - 4 IV, and that both components are located at a common distance of 400 pc, having a common age of 1.2×107yr. Slightly different radial-velocity values are determined for the members of the system, indicating an eccentric orbit. The authors also find evidence that the supergiant A8 Ib component has an outward expanding atmosphere.

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